lmb: Always compile arch_lmb_reserve() into U-Boot on arm
The arch_lmb_reserve() is called by lib/lmb.c lmb_reserve_common() even
if CMD_BOOT{I,M,Z} is not enabled. However, the arm32/arm64 variant of
arch_lmb_reserve() is only compiled in if CMD_BOOT{I,M,Z} is enabled.
This currently does not trigger build error, because there is an empty
weak implementation of arch_lmb_reserve(), however that is not the
function that should be used on arm32/arm64.
Fix this by moving the arch_lmb_reserve() implementation into common
code and always compile it in.
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/lib/stack.c b/arch/arm/lib/stack.c
index b03e1cf..3f961f4 100644
--- a/arch/arm/lib/stack.c
+++ b/arch/arm/lib/stack.c
@@ -12,6 +12,7 @@
*/
#include <common.h>
#include <init.h>
+#include <lmb.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -33,3 +34,47 @@
return 0;
}
+
+static ulong get_sp(void)
+{
+ ulong ret;
+
+ asm("mov %0, sp" : "=r"(ret) : );
+ return ret;
+}
+
+void arch_lmb_reserve(struct lmb *lmb)
+{
+ ulong sp, bank_end;
+ int bank;
+
+ /*
+ * Booting a (Linux) kernel image
+ *
+ * Allocate space for command line and board info - the
+ * address should be as high as possible within the reach of
+ * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
+ * memory, which means far enough below the current stack
+ * pointer.
+ */
+ sp = get_sp();
+ debug("## Current stack ends at 0x%08lx ", sp);
+
+ /* adjust sp by 4K to be safe */
+ sp -= 4096;
+ for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
+ if (!gd->bd->bi_dram[bank].size ||
+ sp < gd->bd->bi_dram[bank].start)
+ continue;
+ /* Watch out for RAM at end of address space! */
+ bank_end = gd->bd->bi_dram[bank].start +
+ gd->bd->bi_dram[bank].size - 1;
+ if (sp > bank_end)
+ continue;
+ if (bank_end > gd->ram_top)
+ bank_end = gd->ram_top - 1;
+
+ lmb_reserve(lmb, sp, bank_end - sp + 1);
+ break;
+ }
+}